std::floor

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Defined in header `<cmath>`

float floor( float arg );

double floor( double arg );

long double floor( long double arg );

Computes nearest integer not greater than arg.

Contents

1 Parameters
2 Return value
3 Notes
4 Example
5 See also

[edit] Parameters

arg - floating point value

[edit] Return value

nearest integer not greater than arg

[edit] Notes

The integer value can be always represented by the given floating point type.

[edit] Example

#include <cmath>
#include <iostream>
 
int main()
{
    std::cout << std::fixed;
    std::cout << std::floor(12.0) << '\n';
    std::cout << std::floor(12.1) << '\n';
    std::cout << std::floor(12.5) << '\n';
    std::cout << std::floor(12.9) << '\n';
    std::cout << std::floor(13.0) << '\n';}

Output:

[edit] See also

nearest integer not less than the given value
(function)

trunc (C++11)

nearest integer not greater in magnitude than the given value
(function)

round lround llround (C++11)
(C++11)
(C++11)

nearest integer, rounding away from zero in halfway cases
(function)

Retrieved from "http://en.cppreference.com/w/cpp/numeric/math/floor"

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